Synthesis of a Novel Double Z-Scheme TiO2/Bi2O3-g-C3N4 Photocatalyst with Enhanced Photocatalytic Performance to Rhodamine B Under Sunlight

Jing, Hongxia; Gao, Yanlin; Li, Long-xiang; Wang, Xu; Pei, Wang-jun; Yang, Xiaofeng

doi:10.1007/s10876-022-02308-4

Cited by 11 publications

(2 citation statements)

References 40 publications

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“…Modification with ZnO was shown to move the absorption window of TiO 2 to the visible region, with improved light conversion efficiency also observed [244,245]. Similar behavior was also reported for CdS/TiO 2 [246], CoSe/TiO 2 [247], SnO 2 /TiO 2 [248,249], ZrO 2 /TiO 2 [250][251][252][253], Ag 2 S/TiO 2 [254], Fe 3 O 4 /TiO 2 [255,256], Co 3 O 4 /TiO 2 [257], WO 3 /TiO 2 [258,259], TiO 2 /Bi 2 O 3 / TiO 2 [260], BiOXs/TiO 2 [261], TiO 2 -WO 3 -Bi 2 O 3 /SiO 2 [262], SiO 2 /TiO 2 [263][264][265][266], and Al 2 O 3 /TiO 2 [267], among others, with the formed heterojunction also observed to improve the absorption wavelength and light-conversion efficiency of each composite material.…”

Section: Semiconductor Recombinationsupporting

confidence: 75%

Preparation and Photocatalytic Activities of TiO2-Based Composite Catalysts

Yang

Chen

et al. 2022

Catalysts

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While modern industry has contributed to the prosperity of an increasingly urbanized society, it has also led to serious pollution problems, with discharged wastewater and exhaust gases causing significant environmental harm. Titanium dioxide (TiO2), which is an excellent photocatalyst, has received extensive attention because it is inexpensive and able to photocatalytically degrade pollutants in an environmentally friendly manner. TiO2 has many advantages, including high chemical stability, low toxicity, low operating costs, and environmental friendliness. TiO2 is an N-order semiconductor material with a bandgap of 3.2 eV. Only when the wavelength of ultraviolet light is less than or equal to 387.5 nm can the valence band electrons obtain the energy of the photons and pass through the conduction band and form photoelectrons, while the valence band, correspondingly, forms photogenerated holes, and light in other areas will not be generated. The most common methods used to improve the photocatalytic efficiency of TiO2 involve increasing its photoresponse range and reducing photogenerated-carrier coupling. The morphology, size, and structure of a heterojunction can be altered through element doping, leading to improved photocatalytic efficiency. Mainstream methods for preparing TiO2 are reviewed in this paper, with several excellent preparation schemes for improving the photocatalytic efficiency of TiO2 introduced. TiO2 is mainly prepared using sol-gel, solvothermal, hydrothermal, anodic oxidation, microwave-assisted, CVD and PVD methods, and TiO2 nanoparticles with excellent photocatalytic properties can also be prepared. Ti-containing materials are widely used to purify harmful gases, as well as contaminants from building materials, coatings, and daily necessities. Therefore, the preparation and applications of titanium materials have become globally popular research topics.

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Section: Semiconductor Recombinationsupporting

confidence: 75%

Preparation and Photocatalytic Activities of TiO2-Based Composite Catalysts

Yang

Chen

et al. 2022

Catalysts

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“…Since the discovery of TiO 2 , it has been widely studied as a classical photocatalyst. At present, TiO 2 preparation, crystal control, morphology control, and other aspects of technology have become increasing perfect [13][14][15]. However, a TiO 2 wide band [1] gap leads to a low visible light response rate, and cannot fully and effectively use visible light for photocatalysis, restricting its widespread industrial utilization [16].…”

Section: Introductionmentioning

confidence: 99%

Application of ZnO/WO3 Composite Nanofiber Photocatalysts in Textile Wastewater Treatment

Yan

Chen

2023

Separations

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Semiconductor photocatalysis technology is an environmentally friendly and efficient emerging technology. This method can use sunlight as a driving force to quickly decompose organic pollutants in water bodies. Zinc oxide (ZnO) and tungsten oxide (WO3) photocatalysts can absorb sunlight and participate in photocatalytic degradation reactions due to their relatively narrow band gap. Highly photosensitive WO3 nanofibers and ZnO/WO3 composite nanofibers were fabricated via the electrospinning method. When 100 mg/L of rhodamine B (Rh B) solution was used as the degradation substrate, the degradation efficiencies of WO3 and ZnO/WO3 for Rh B dye were 70% and 90%, respectively, after a photocatalytic reaction of 120 min. The surface morphology, crystal structure, and optical properties of ZnO/WO3 composite nanofibers and WO3 nanofibers were characterized by SEM, XRD, XPS, and UV-vis absorption spectra, and the experimental results were analyzed and explained using different mechanisms. The results show that ZnO/WO3 composite nanofibers have better UV-visible light absorption performance, and the sample has a higher UV-visible light utilization rate. This was mainly due to the fact that a P-N heterojunction was formed in the semiconductor composite, and the electron–hole pair could realize rapid separation under the drive of a built-in electric field force, which promoted the migration of carrier. Therefore, the photocatalytic activity of the ZnO/WO3 catalyst was significantly higher than that of the WO3 catalyst, which promoted rapid improvement of the photocatalytic degradation efficiency of the Rh B dye.

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Controllable Synthesis of Bi_xO_yBr_z/TiO₂ Heterojunctions with Excellent Visible‐Light‐Driven Photocatalytic Activities for Phenol

Fang,

Niu,

Zhang

et al. 2024

Adv Materials Inter

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BixOyBrz/TiO2 composites have been synthesized by hydrothermal method, with TiO2 nanoparticles being employed as substrate. During the process of hydrothermal reaction, both temperature and pH have been utilized to effectively regulate the Bi/Br atomic ratio of BixOyBrz/TiO2 composites. In essence, the competitive reaction between OH− and Br− in the solution is the key factor to form BixOyBrz with different Bi/Br atomic ratios. Under visible light, the prepared Bi4O5Br2/TiO2 heterojunction demonstrates higher photocatalytic activity than other BixOyBrz/TiO2 composites for phenol and Rh B. The removal rate of phenol with Bi4O5Br2/TiO2 heterojunction is up to 92.1% after irradiation for 75 min. The excellent photocatalytic activities of Bi4O5Br2/TiO2 heterojunction are mainly attributed to its optimized microstructure and the matching band energy structure, whereby TiO2 nanoparticles with ≈10 nm diameter uniformly arranged on ≈10.2 nm thick Bi4O5Br2 nanosheets. Moreover, the heterojunction structure promotes the separation of photo‐generated electrons and holes in Bi4O5Br2/TiO2, while and h+ are the main active species during its photocatalytic processes.

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Synthesis of a Novel Double Z-Scheme TiO2/Bi2O3-g-C3N4 Photocatalyst with Enhanced Photocatalytic Performance to Rhodamine B Under Sunlight

Cited by 11 publications

References 40 publications

Preparation and Photocatalytic Activities of TiO2-Based Composite Catalysts

Preparation and Photocatalytic Activities of TiO2-Based Composite Catalysts

Application of ZnO/WO3 Composite Nanofiber Photocatalysts in Textile Wastewater Treatment

Controllable Synthesis of Bi_xO_yBr_z/TiO₂ Heterojunctions with Excellent Visible‐Light‐Driven Photocatalytic Activities for Phenol

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Synthesis of a Novel Double Z-Scheme TiO2/Bi2O3-g-C3N4 Photocatalyst with Enhanced Photocatalytic Performance to Rhodamine B Under Sunlight

Cited by 11 publications

References 40 publications

Preparation and Photocatalytic Activities of TiO2-Based Composite Catalysts

Preparation and Photocatalytic Activities of TiO2-Based Composite Catalysts

Application of ZnO/WO3 Composite Nanofiber Photocatalysts in Textile Wastewater Treatment

Controllable Synthesis of BixOyBrz/TiO2 Heterojunctions with Excellent Visible‐Light‐Driven Photocatalytic Activities for Phenol

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Controllable Synthesis of Bi_xO_yBr_z/TiO₂ Heterojunctions with Excellent Visible‐Light‐Driven Photocatalytic Activities for Phenol